Vehicle AC generator's stator

Abstract

A stator for a vehicle ac generator includes a stator core having a plurality of slots and a star-connected stator winding. The stator winding has a plurality of sets of U-shaped large and small segments. The large segment has a pair of in-slot portions respectively disposed in the radially outermost slot-layer and radially innermost slot-layer. The small segment has a pair of in-slot portions respectively disposed in the radially outer middle slot-layer and radially inner middle slot-layer. Three output terminal ends respectively extend from the small segments, and three neutral terminal ends respectively extend from the large segments.

What is claimed is:  
     
       1. A stator for a vehicle ac generator comprising: 
       a stator core having a plurality of slots, said slot having radially aligned four slot layers;  
       a star-connected stator winding comprising a plurality of sets of U-shaped large and small segments, said large segment having a pair of in-slot portions respectively disposed in radially outermost slot-layer and radially innermost slot-layer, said small segment having a pair of in-slot portions respectively disposed in radially outer middle slot-layer and radially inner middle slot-layer;  
       three output terminal ends respectively extending from said small segments; and  
       three neutral terminal ends respectively extending from said large segments.  
     
     
       2. A stator for a vehicle ac generator comprising: 
       a stator core having a plurality of slots;  
       a star-connected stator winding comprising a plurality of in-slot portions respectively disposed in radially outside layer, at least one radially middle layer and radially inside layer output lead wires extending from said middle layer;  
       three output terminal ends; and  
       three neutral terminal ends extending from one of said outside layer and inside layer.  
     
     
       3. A stator for a vehicle ac generator comprising: 
       a stator core having a plurality of slots;  
       a stator winding having a plurality of in-slot portions respectively disposed in radially outside layer, at least one radially middle layer and radially inside layer; and  
       output lead wires extending from said middle layer.  
     
     
       4. The stator as claimed in claim  3 , wherein 
       said stator winding comprises three phase star-connected windings having a neutral point, and  
       neutral terminal ends respectively extend from said radially inside layer and connected to each other to form said neutral point.  
     
     
       5. The ac generator as claimed in claim  3 , wherein 
       said stator winding comprises a plurality of U-shaped segments having a U-turn portion disposed at a first end of said stator core and a pair of segment ends disposed at a second end of said stator and connected to one another, and  
       said output lead wires extend from said first end.